Some of the most memorable characters in television were never actually seen. They were talked about, and their presence, even if it was always offscreen, was often crucial to the plot. I've come up with five awesome (but unseen) TV characters. Here they are:

Vera: From what I recall, Vera, the wife of beer-lover Norm Peterson on Cheers, made only one appearance on the show, and that was just her legs. According to both Wikipedia and IMDb, she was played by George Wendt's real-life wife, Bernadette Birkette.